media: amphion: Set video drvdata before register video device

The video drvdata should be set before the video device is registered,
otherwise video_drvdata() may return NULL in the open() file ops, and led
to oops.

Fixes: 3cd0845 ("media: amphion: add vpu v4l2 m2m support")
Cc: <stable@vger.kernel.org>
Signed-off-by: Ming Qian <ming.qian@nxp.com>
Reviewed-by: TaoJiang <tao.jiang_2@nxp.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/platform/amphion/vpu_v4l2.c

@@ -841,14 +841,14 @@ int vpu_add_func(struct vpu_dev *vpu, struct vpu_func *func)
 		vfd->fops = vdec_get_fops();
 		vfd->ioctl_ops = vdec_get_ioctl_ops();
 	}
+	video_set_drvdata(vfd, vpu);
 
 	ret = video_register_device(vfd, VFL_TYPE_VIDEO, -1);
 	if (ret) {
 		video_device_release(vfd);
 		v4l2_m2m_release(func->m2m_dev);
 		return ret;
 	}
-	video_set_drvdata(vfd, vpu);
 	func->vfd = vfd;
 
 	ret = v4l2_m2m_register_media_controller(func->m2m_dev, func->vfd, func->function);